tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include "xfs.h"
19#include <linux/proc_fs.h>
20
21DEFINE_PER_CPU(struct xfsstats, xfsstats);
22
23static int xfs_stat_proc_show(struct seq_file *m, void *v)
24{
25 int c, i, j, val;
26 __uint64_t xs_xstrat_bytes = 0;
27 __uint64_t xs_write_bytes = 0;
28 __uint64_t xs_read_bytes = 0;
29
30 static const struct xstats_entry {
31 char *desc;
32 int endpoint;
33 } xstats[] = {
34 { "extent_alloc", XFSSTAT_END_EXTENT_ALLOC },
35 { "abt", XFSSTAT_END_ALLOC_BTREE },
36 { "blk_map", XFSSTAT_END_BLOCK_MAPPING },
37 { "bmbt", XFSSTAT_END_BLOCK_MAP_BTREE },
38 { "dir", XFSSTAT_END_DIRECTORY_OPS },
39 { "trans", XFSSTAT_END_TRANSACTIONS },
40 { "ig", XFSSTAT_END_INODE_OPS },
41 { "log", XFSSTAT_END_LOG_OPS },
42 { "push_ail", XFSSTAT_END_TAIL_PUSHING },
43 { "xstrat", XFSSTAT_END_WRITE_CONVERT },
44 { "rw", XFSSTAT_END_READ_WRITE_OPS },
45 { "attr", XFSSTAT_END_ATTRIBUTE_OPS },
46 { "icluster", XFSSTAT_END_INODE_CLUSTER },
47 { "vnodes", XFSSTAT_END_VNODE_OPS },
48 { "buf", XFSSTAT_END_BUF },
49 { "abtb2", XFSSTAT_END_ABTB_V2 },
50 { "abtc2", XFSSTAT_END_ABTC_V2 },
51 { "bmbt2", XFSSTAT_END_BMBT_V2 },
52 { "ibt2", XFSSTAT_END_IBT_V2 },
53 };
54
55 /* Loop over all stats groups */
56 for (i=j = 0; i < ARRAY_SIZE(xstats); i++) {
57 seq_printf(m, "%s", xstats[i].desc);
58 /* inner loop does each group */
59 while (j < xstats[i].endpoint) {
60 val = 0;
61 /* sum over all cpus */
62 for_each_possible_cpu(c)
63 val += *(((__u32*)&per_cpu(xfsstats, c) + j));
64 seq_printf(m, " %u", val);
65 j++;
66 }
67 seq_putc(m, '\n');
68 }
69 /* extra precision counters */
70 for_each_possible_cpu(i) {
71 xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
72 xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
73 xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;
74 }
75
76 seq_printf(m, "xpc %Lu %Lu %Lu\n",
77 xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
78 seq_printf(m, "debug %u\n",
79#if defined(DEBUG)
80 1);
81#else
82 0);
83#endif
84 return 0;
85}
86
87static int xfs_stat_proc_open(struct inode *inode, struct file *file)
88{
89 return single_open(file, xfs_stat_proc_show, NULL);
90}
91
92static const struct file_operations xfs_stat_proc_fops = {
93 .owner = THIS_MODULE,
94 .open = xfs_stat_proc_open,
95 .read = seq_read,
96 .llseek = seq_lseek,
97 .release = single_release,
98};
99
100int
101xfs_init_procfs(void)
102{
103 if (!proc_mkdir("fs/xfs", NULL))
104 goto out;
105
106 if (!proc_create("fs/xfs/stat", 0, NULL,
107 &xfs_stat_proc_fops))
108 goto out_remove_entry;
109 return 0;
110
111 out_remove_entry:
112 remove_proc_entry("fs/xfs", NULL);
113 out:
114 return -ENOMEM;
115}
116
117void
118xfs_cleanup_procfs(void)
119{
120 remove_proc_entry("fs/xfs/stat", NULL);
121 remove_proc_entry("fs/xfs", NULL);
122}